PENGARUH PENERAPAN UNDERSTENDING BY DESIGN BACKWARD DAN GAMEFIKASI PADA PENINGKATAN BERPIKIR KRITIS PESERTA DIDIK. jpe-unima [Internet]. 2025 Oct. 23 [cited 2026 Mar. 24];5(1s):236 248. Available from: https://ejurnal.unima.ac.id/index.php/jpe-unima/article/view/8712